Hot swapping and plug-and-play

Hot swapping (hot-ging or Hot Swap) is charged, and hot swapping isAllow users to take out and replace damaged hard drive, power supply or board components without shutting down the system or power supply, this improves the system's timely disaster recovery capabilities, scalability, and flexibility.For example, some disk image systems for high-end applications can provide hot swapping of disks. Specifically, the academic statement is:Hot replacement, hot addition, and hot upgrade).

PNP is the abbreviation of plug-and-play (plug-and-play. Its role isAutomatically configure the Board and other devices in the (low-level) computer, and then tell the corresponding device what has been done. The PNP task isPhysical devices and software (Device DriversProgram), And operate the device to establish a communication channel between each device and its driver.. In other words, PNP allocates the following resources to devices and hardware:I/O address, IRQ, DMA channel, and memory segment.